Zerank 1 Small
Compact 1.7B parameter model with novel ELO-based training on synthetic pairwise data for calibrated relevance scores. Half the cost of competing rerankers while maintaining strong ranking quality.
Model Information
- Provider
- ZeroEntropy
- License
- Open Source
- Price per 1M tokens
- $0.025
- Release Date
- 2025-07-10
- Model Name
- zerank-1-small
- Total Evaluations
- 2100
Performance Record
Wins1180 (56.2%)
Losses840 (40.0%)
Ties80 (3.8%)
Wins
Losses
Ties
Performance Overview
ELO ratings by dataset
Zerank 1 Small's ELO performance varies across different benchmark datasets, showing its strengths in specific domains.
Zerank 1 Small - ELO by Dataset
Detailed Metrics
Dataset breakdown
Performance metrics across different benchmark datasets, including accuracy and latency percentiles.
MSMARCO
ELO 159749.7% WR174W-123L-53T
Accuracy Metrics
- nDCG@5
- 0.965
- nDCG@10
- 0.968
- Recall@5
- 0.987
- Recall@10
- 0.993
Latency Distribution
- Mean
- 1014ms
- P50 (Median)
- 1010ms
- P90
- 1097ms
FiQa
ELO 155163.4% WR222W-119L-9T
Accuracy Metrics
- nDCG@5
- 0.114
- nDCG@10
- 0.124
- Recall@5
- 0.098
- Recall@10
- 0.125
Latency Distribution
- Mean
- 969ms
- P50 (Median)
- 977ms
- P90
- 1086ms
business reports
ELO 154856.6% WR198W-140L-12T
Latency Distribution
- Mean
- 1051ms
- P50 (Median)
- 1060ms
- P90
- 1171ms
PG
ELO 154761.7% WR216W-134L-0T
Latency Distribution
- Mean
- 1224ms
- P50 (Median)
- 1187ms
- P90
- 1307ms
SciFact
ELO 149852.9% WR185W-161L-4T
Accuracy Metrics
- nDCG@5
- 0.869
- nDCG@10
- 0.872
- Recall@5
- 0.916
- Recall@10
- 0.920
Latency Distribution
- Mean
- 1345ms
- P50 (Median)
- 1272ms
- P90
- 1552ms
DBPedia
ELO 146752.9% WR185W-163L-2T
Accuracy Metrics
- nDCG@5
- 0.683
- nDCG@10
- 0.739
- Recall@5
- 0.061
- Recall@10
- 0.102
Latency Distribution
- Mean
- 1053ms
- P50 (Median)
- 1034ms
- P90
- 1170ms
Compare Models
See how it stacks up
Compare Zerank 1 Small with other top rerankers to understand the differences in performance, accuracy, and latency.